@article{MET_1971__17_175468,
     author = {S. Koller},
     title = {M\"ogliche {Aussagen} bei {Fragen} der statistischen {Ursachenforschung}},
     journal = {Metrika},
     pages = {30--42},
     publisher = {mathdoc},
     volume = {17},
     year = {1971},
     url = {http://geodesic.mathdoc.fr/item/MET_1971__17_175468/}
}